nStor CR8e, Руководство пользователя, Страница: 18 / 92

Getting Started
I/O Interface Card
6
I/O Interface Card
The I/O Interface card provides the connection from the subsystem’s bus to the
host adapter. Located on the I/O Interface card are two 68-pin very high density
(VHD) SCSI connectors. The connectors are labeled Channel 0 and Channel 1.
The I/O Interface card incorporates built-in automatic SCSI termination. When a
data cable is plugged in, the system automatically senses the connection and
provides the required SCSI termination.
Two sets of jumpers are provided on the card. One set of jumpers (JP1 and JP2)
routes Term Power in the event that the host controller does not provide it. The
default setting is the unjumpered condition (jumper offset on one pin only).
The next set of jumpers, JP3 and JP4, addresses termination protocol for a specific
set of controllers that use the DEC Fault Bus. If you are using a DEC system
where the controller uses this protocol, you will need to jumper locations (jumper
on both pins) JP3 and JP4 for each channel that has an external SCSI cable
connected. This will disable termination at that point.
If you are using a standard host adapter that provides Term Power, no change is
required and SCSI bus termination will occur automatically.
Power Cord Connector and Fuse
The power cord connector supplies the AC power to the CR8e through a power
cord connected to a conventional three-hole grounded outlet or power strip. A
250V 10 amp fuse is provided to protect the system from any electrical fault.
Channel 0
Channel 1
JP3 and JP4
Fault Bus Protocol
Jumpers (Add to
disable termination)
JP1 and JP2
Channel 0 and 1
Term Power Jumpers